Bug report #19431
$rownum (and possibly other functions) do not work on virtual fields
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Field calculator | ||
| Affected QGIS version: | 3.3(master) | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | wontfix |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 27259 |
Description
It always return "0".
Another example is "count", which returns always NULL.
Tested on LTR and master.
On non virtual fields are ok.
History
#1
Updated by Luigi Pirelli over 6 years ago
confirmed on master an 2.18 LTR
#2
Updated by Luigi Pirelli over 6 years ago
rownumber is filled here
https://github.com/qgis/QGIS/blob/master/src/app/qgsfieldcalculator.cpp#L274
but completly skipped here
https://github.com/qgis/QGIS/blob/master/src/app/qgsfieldcalculator.cpp#L197 in case of virtualfields
probably a simple if reorganization would solve... investigating more
#3
Updated by Nyall Dawson over 6 years ago
- Resolution set to wontfix
- Status changed from Open to Closed
It's deliberately not exposed here, because it has no meaning outside of the field calculator (since virtual fields are "global" for a layer, yet the layer may be opened in two different attribute table dialogs both with different sort orders). Use $id instead.